Luke chapman



(No Model.)

L. CHAPMAN.

MANUFACTURE OF WRENCH FORGINGS. No. 800,445.- Patented June 17, 1884.

T' .1. I Z9 /3%z 2 I 4;; zn 5 /%an Fgyo 5 129% I F2 17. +1 ii 1" A Fly; 6

ii/'z'zzess es. fzzyezz 021 ldnirnn Srnrns LUKE Cl'IAPMAN, OF COLLINSVILLE, CONNECTICUT, ASSIGNOR TO THE- COLLINS COMPANY, OF SAlllE PLACE.

MANUFACTURE OF WRENCH-=FORGENGS.

SPECIFICATION forming part of Letters Patent No. 300365, dated June 17, 188%.

Application filed April 23, 1882. Renewed October 19, 1893. (X model.)

10 (2Z5 whom it may concern:

Be it known that I, LUKE CHAPMA'X, of Collinsville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements Pertaining to the Manuiacture of rench-Forgings, of which the following is a specification, refer ence being had to the accompanying drawings, in which Figure 1 shows a side View of a bar-section (of iron or steel) such as commercial bars are cut into as a step preparatory to the other steps taken in carrying out this invent-ion. Fig. 2 shows an edge View of the same barsection. Fig. 3 shows a side View of the same bar-section after its division, by suitable dies or spears, into two corresponding blanks. Fig. -21: shows a face YlBW of the heading-die. Fig. 5 shows a side View of the heading-die. Figs. 6 and '7 show i'ace views of the corresponding parts of the holding-dic. One of these parts is represented as holding one of the blanks shown in Fig. 3, preparatory to the heading operation. Figs. 8 and 9 show upper end views of the corresponding parts of the holding-die, as in Fig. 6 the blank is shown in one of the parts. Fig. 10 shows a View of the forging produced by the heading operation.

This invention is herein shown ainl described as applied to the production of a forging for the bar and head of a hammer or monkey wrench. These i'orgings were originally pro duced by the common blaeksmiths art. Since then Yario s methods and means have been tried to abridge and chcapcn their manufacture.

An advantage of the methods and means herein described is that one is enabledgo take connnereial bars-that is, bars of iron or steel such as are readily procurable in market without extra cost for peculiarity of shapeand by short and simple and cheap operations eonvert them into the desired forgings.

This method and means are as follows: Take commercial bars, substantially rectangular in cross-section with greater width than thickness, and cut them-eold or hot, but prefera;

bly eoldinto the lengths or bar-sections d. Then by suitable cutting-dies or shears out these bar-sectionseold or hot, but preferably coldinto the two corresponding blanks I). Then heat the large end of the blank to a forging-heat and place it in the holding-die. This holding-die has a head-1natri:\: for forming the head and a bar-matrix for holding the bar. It is preferably made in two corresponding lialves or parts, 0 c, which, in suitable machinery and under suitable power, close together face to face to hold the blank during the heading operation, and then open again. After the blank is in place in the holding-die, the heading-die I], moved by suitable machinery and under suitable power, advances toward the holding-die, upsetting the enlarged end of the blank, and Forcing the metal thereof to fill the hea ll-nm-trix of the holdingdie, after which the heading-die retreats to its normal position of rest. Practically the amount of stock in the enlarged end of the blank should be slightly in excess of the amount required for the head of the forg ing, in order to insure the complete and entire filling of the headmatrix. This excess will form a fin, c, on the forging, which is afterward trimmed oli'.

The essential feature of. the blank I) is that the enlargement at one end is substantially on one side of the bar, and that it has underneath the shoulder I) Z)", which, by resting upon the bottom of the l'lGiLLlJllfillllX, substantially aids in supporting the blank under the heading operation.

The characteristic feature of the dies is that the walls 01' the head-matrix form the bottom,

- sides, anch end or ends of the head, while the heading-die does not enter the holding-die, but overlaps the head-matrix, and in action forces the excess of metal into lateral flu or fins. I

A substantial part of this invention is used if the cutting of the bar-section into the corresponding blanks b I) is omitted and blanks of this shape be otherwise produced.

To give an idea of the dimensions of the commercial bars used and of the blanks and dies, I have in some of the accompanying tions (0 into the blanks b b, and then heading drawings given in figures the dimensions for the blanks in dies all substantially as herein a fifteen-inch wrench. Dimensions for other described.

sizes can be readily gotten at from these. LUKE CHAPMAN. 5 I claim as my invention Vitnesses:

The method, art, or process of producing OLIVER F. PERRY, Wreneh-forgings, consisting in cutting bar-see- ALBERT L. THAYER. 

